20200615-Optics-Mtg

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Logistic information

 Toll-Free Number (U.S.&  Canada):  888-240-2560
 PARTICIPANT CODE:                  # 585 129 220
 Room IRL:                            <none>

Agenda

Please post slides in haplog or docdb, before the meeting

1. Siyu
   • Watercell precision and systematics
   • comparing central value +/- error for various sieve holes and measurements.
2. Ryan:
   • verifying the PREX database [ RHRS Momentum http://ace.phys.virginia.edu/HAPPEX/4134]

Minutes

1. Residuals for PREX-2 database
   • reoptimization led to great improvement in dp residuals for +1,0,-1 runs
   • except that the dp=-1% residuals were all shifted to one side significantly
   • the phi_target reconstruction suggested pretty big changes between different dp runs.
   • this should look pretty different when plotted as residuals.
   • Next time: look at theta and phi residuals for all dp runs for old and newly reoptimized data base
2. CREX water cell results (Siyu)
   • new optimization using average from each hole provides good resutls
   • consistency in pointing angle at 0.03 degree level, about 0.6% in angle so 1.2% in Q2.
   • Q: I forgot to ask at the meeting - is this just central hole? Wondering if there is agreement from one side of the acceptance to the other.
   • now looking at PREX water cell data, starting with database.
   • will post slides...
3. forgot to mention: next week is during JLUO 2020, so we won't have a monday optics meeting with the full group